Improper access control on API endpoints
CVSSv3 Score: 9.1 An Improper Access Control vulnerability [CWE-284] in FortiAuthenticator may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests. Revised on 2026-05-12 00:00:00
CSIRTS triage
- What
- An Improper Access Control vulnerability may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.
- Who is affected
- Deployments of FortiAuthenticator are affected.
- Urgency
- Remediation is urgent due to the high CVSS score of 9.1 indicating severe risk.
- Action
- Update to the latest version of FortiAuthenticator to mitigate this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://fortiguard.fortinet.com/psirt/FG-IR-26-128
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-442770.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-44277 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Improper access control
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-40452: Incorrect Authorization, Improper Access Control vulnerability in Apache IoTDB. Authorization …nvd · 2026-07-10
- mediumCVE-2026-40009: Improper Privilege Management, Improper Access Control vulnerability in Apache IoTDB. Authenti…nvd · 2026-07-10
- unknownCVE-2026-21050: Improper access control in SmartThingsKit prior to SMR Jul-2026 Release 1 allows local attacke…nvd · 2026-07-10
- unknownCVE-2026-21041: Improper access control in SamsungSEAgentService prior to SMR Jul-2026 Release 1 allows local …nvd · 2026-07-10
- unknownCVE-2026-21040: Improper access control in IAFDService prior to SMR Jul-2026 Release 1 allows local privileged…nvd · 2026-07-10
- unknownCVE-2026-21039: Improper access control in Settings prior to SMR Jul-2026 Release 1 allows local attackers to …nvd · 2026-07-10
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